CentOS7更新Apache由2.4.6至2.4.56後產生的問題解決

1.Syntax error on line 31 of /etc/httpd/conf.d/php.conf: Invalid command 'php_value'

解決辦法 

(1) Connect to the server via SSH

(2) Create a backup of the configuration file:
# cp /etc/httpd/conf.d/php.conf{,.orig}

(3) Edit /etc/httpd/conf.d/php.conf
file in any text editor and edit the syntax to include the <IfModule mod_php5.c> tags:

BEFORE:

php_value session.save_handler "files"

php_value session.save_path "/var/lib/php/session"

AFTER:

<IfModule mod_php5.c>

php_value session.save_handler "files"

php_value session.save_path    "/var/lib/php/session"

</IfModule>

2.CentOS 7 安裝和升級 PHP 7.x

(1) 前置作業，安裝所須軟體：

yum install -y wget yum-utils

(2) 由於較新版的 PHP7 並末收錄在 CentOS 7，因此須先更新軟體來源：

wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm

wget http://rpms.remirepo.net/enterprise/remi-release-7.rpm

rpm -Uvh epel-release-latest-7.noarch.rpm

rpm -Uvh remi-release-7.rpm

(3)安裝 PHP 與相關軟體

會直接安裝上述指定的 PHP 版本：

yum install -y php php-mysqlnd php-pdo php-xml php-pear php-devel php-mbstring re2c gcc-c++ gcc

(4) 移除下載的檔案：

rm epel-release-latest-7.noarch.rpm remi-release-7.rpm

(5)檢查 PHP 版本

檢查目前安裝的版本為 PHP 7.2.5：

[root@localhost ~]# php -v

PHP 7.2.5 (cli) (built: Apr 24 2018 19:12:06) ( NTS )

Copyright (c) 1997-2018 The PHP Group

Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies

3.升級PHP之後還會遇到函數修改的問題

PHP>=5.5 時所有以 mysql_開頭的函數都會作廢 deprecated，改用以 mysqli_開頭的函數取代

(1) 建立資料庫連線，設定編碼

$DBNAME = "db";

$DBUSER = "user";

$DBPASSWD = "password";

$DBHOST = "localhost";

 

$conn = mysqli_connect( $DBHOST, $DBUSER, $DBPASSWD, $DBNAME);




// 設定連線編碼

mysqli_query( $conn, "SET NAMES 'utf8'");




if (empty($conn)){

  print mysqli_error($conn);

  die ("無法連結資料庫");

  exit;

}

(2) 取得資料

$sql ="select * from `table` where id=123";

$result = mysqli_query($conn, $sql);




備註

$result = mysql_query($sql) 修改成

$result = mysqli_query($conn,$sql) or die($sql);

(3) 關聯群組

$rs=mysql_fetch_array($result); 修改成

$rs=mysqli_fetch_array($result);

(4) 關閉連線

mysqli_close($conn);

5.強制讓PHP報錯

<?php

ini_set('display_errors','1');

error_reporting(E_ALL);

或

ini_set('display_errors','1');

error_reporting(E_ALL ^ E_NOTICE);

?>